This versatile filtration cup accommodates ceramic media, carbon, GFO, or your preferred filter material, making it adaptable to any aquarium setup. Water flows efficiently through strategically positioned bottom slots, ensuring thorough media contact and superior filtration performance. As a durable, reusable alternative to disposable filter socks, it reduces ongoing costs while maintaining effectiveness. Swap filter floss pads every few days for crystal-clear water polishing. An economical, low-maintenance solution for serious aquarists seeking reliable mechanical and chemical filtration.